<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>

<body>
  <div id="app">
    <table>
      <!-- <mycomponet1></mycomponet1> -->
      <tr is="mycomponet1"></tr>
    </table>
  </div>
  <script>
    Vue.component('mycomponet1', {
      template: `
        <tr>mycomponet1</tr>
      `
    })

    //根组件
    var app = new Vue({
      el: '#app'
    })
  </script>
</body>

</html>